[Home](./index.md) > [bitburner](./bitburner.md) > [Sleeve](./bitburner.sleeve.md) > [travel](./bitburner.sleeve.travel.md)
## Sleeve.travel() method
If you are not in BitNode-10, then you must have Source-File 10 in order to use this function.
Return a boolean indicating whether or not the sleeve reached destination.
Signature:
```typescript
travel(sleeveNumber: number, cityName: City): boolean;
```
## Parameters
| Parameter | Type | Description |
| --- | --- | --- |
| sleeveNumber | number | Index of the sleeve to travel. |
| cityName | [City](./bitburner.city.md) | Name of the destination city. |
Returns:
boolean
True if the sleeve reached destination, false otherwise.
## Remarks
4 GB